Errr, no there was a clear majority vote for leaving the EU.
https://en.wikipedia.org/wiki/Results_of_the_United_Kingdom_...
https://en.wikipedia.org/wiki/Results_of_the_United_Kingdom_...
What do you propose? Compulsory voting?
Many were genuinely undecided and made a conscious decision to abstain.
The Brexit referendum would have had a huge impact either way.
A Remain vote would have weakened the UK government's position and emboldened the EU as it seeks to form an ever closer union of its member states.